Loingsech, an Irish language male name meaning exile or sailor, might refer to: Labhraidh Loingseach, a legendary high king of Ireland and ancestor of the Laigin Loingsech mac Colmáin (died 655), king of Leinster Loingsech mac Flaithbertaig (died 754), chief of the Cenél Conaill Loingsech mac Óengusso (died 704), high king of Ireland